LA MESA, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(044735) LA MESA
From Year=1899 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	301	241	231	145	76	22	1	0	4	34	143	264	1462
60	162	118	102	48	13	1	0	0	0	5	48	129	625
57	94	62	48	18	2	0	0	0	0	1	18	68	312
55	60	36	24	7	1	0	0	0	0	1	8	41	176
50	13	6	2	0	0	0	0	0	0	0	0	7	30

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu